<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    console.log(1);
    setTimeout(()=>{
      console.log(2);
    },0)

    var promise = new Promise((resolve,reject)=>{
      resolve(3)
    })

    promise.then(res=>{
      console.log("res=>>",res);
    })

    console.log(4);

    // 1432
  </script>
</body>
</html>